diff --git a/packages/core/src/utils/supports.ts b/packages/core/src/utils/supports.ts
index 5c7f173c3d6e..7ac3b4789765 100644
--- a/packages/core/src/utils/supports.ts
+++ b/packages/core/src/utils/supports.ts
@@ -80,7 +80,8 @@ function _isFetchSupported(): boolean {
 
   try {
     new Headers();
-    new Request('http://www.example.com');
+    // Deno requires a valid URL so '' cannot be used as an argument
+    new Request('data:,');
     new Response();
     return true;
   } catch {